Stan Lee has been admitted to Cedars-Sinai Medical Center in Los Angeles after experiencing shortness of breath and an irregular heartbeat, TMZ first reported.A spokesperson for Lee later said the 95-year-old writer is "doing well and feeling good; he is staying there for a few days for some check-ups as a safety precaution."

Lee attended Monday's Black Panther purple carpet premiere on Monday, January 29, and posed with fans as seen in this photo.